| Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144) |
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| 02/09/2000 | CN1243819A Natural pectic acid and its preparing process |
| 02/08/2000 | US6022992 Acid-salt metathetic process |
| 02/08/2000 | US6022982 Acid catalyst selected from the group consisting of h2so4, methane sulfonic acid, trifluoromethane sulfonic acid, and mixtures thereof |
| 02/06/2000 | CA2279061A1 Acetic acid reactive distillation process based on dme/methanol carbonylation |
| 02/05/2000 | CA2279637A1 Process for the preparation of 4-(4'-chlorobiphenyl-4-yl)-4-keto-2-methylenebutyric acid |
| 02/03/2000 | WO2000005402A1 Continuous process for preparing optically pure (s)-3,4-dihydroxybutyric acid derivatives |
| 02/03/2000 | WO2000005401A1 Continuous process for preparing optically pure (s)-3-hydroxy-gama-butyrolactone |
| 02/03/2000 | WO2000005400A1 Process for preparing optically pure (s)-3,4-dihydroxybutyric acid derivatives |
| 02/03/2000 | WO2000005399A1 Process for preparing optically pure (s)-3-hydroxy-gama-butyrolactone |
| 02/03/2000 | WO2000005398A1 Process for preparing alpha-(1,4) linked oligosaccharide |
| 02/03/2000 | WO2000005188A1 Method for producing acrylic acid |
| 02/03/2000 | WO2000005187A1 Method for producing ortho-alkylated benzoic acid derivatives |
| 02/03/2000 | DE19929573A1 Production of pyromellitic anhydride involves oxidation of tetra alkyl benzene on a mixed oxide catalyst containing vanadium, tungsten and co-catalyst metals, supported on rutile and tungsten and/or silicon carbide |
| 02/03/2000 | DE19833118A1 Verfahren zur Herstellung von orthoalkylierten Benzoesäurederivaten Process for the preparation of benzoic acid derivatives orthoalkylierten |
| 02/03/2000 | CA2338757A1 Continuous process for preparing optically pure (s)-3,4-dihydroxybutyric acid derivatives |
| 02/03/2000 | CA2338756A1 Continuous process for preparing optically pure (s)-3-hydroxy-gama-butyrolactone |
| 02/03/2000 | CA2338755A1 Process for preparing alpha-(1,4) linked oligosaccharide |
| 02/03/2000 | CA2338752A1 Process for preparing optically pure (s)-3,4-dihydroxybutyric acid derivatives |
| 02/03/2000 | CA2338527A1 Process for preparing optically pure (s)-3-hydroxy-gama-butyrolactone |
| 02/03/2000 | CA2338300A1 Process for the preparation of ortho-alkylated benzoic acid derivatives |
| 02/02/2000 | EP0976712A1 Fluorine-containing carboxylic acid compounds, methods for their production, and chemical processes utilizing the same |
| 02/02/2000 | EP0976711A1 Process for the production of acetic acid |
| 02/02/2000 | EP0976710A1 Process for the production of acetic acid by the carbonylation of dimethyl ether |
| 02/02/2000 | EP0976702A1 Method for inhibiting polymerization of a vinyl compound |
| 02/02/2000 | EP0975572A1 A novel process to produce stabilized carnosic acid in high concentration |
| 02/02/2000 | CN1243511A Preparation of -3,4-dicarboxylic anhydrides |
| 02/02/2000 | CN1243504A Apparatus and method for recovering sorbic acid |
| 02/02/2000 | CN1243115A Polymerization inhibiting method for ethenyl chemical compound |
| 02/02/2000 | CN1243034A Improved ractor system |
| 02/01/2000 | USRE36549 Distillation fatty acid; oxidation |
| 02/01/2000 | US6020525 (2S,2'R,3'R)-2-(2,3-dicarboxyl-cyclopropyl)-glycine (DCG-1/4) and 3 H-DCG-1/4 and to process for the preparation thereof |
| 02/01/2000 | US6019874 Separation of conjugated linoleic acids by azeotropic distillation |
| 02/01/2000 | CA1340886C 1, 2-di (4-isobutylphenyl) hydrocarbon and its preparation and uses as intermediate |
| 01/27/2000 | WO2000003965A1 Derivatives of 1-oxyl-4-hydroxy- or 4-amino-2,2,6,6-tetramethylpiperidine as polymerization inhibitors for (meth)acrylate monomers |
| 01/27/2000 | WO2000003964A1 Method for the acidic or alkaline saponification of biphenyl nitriles |
| 01/27/2000 | WO1999062856A3 Citric acid doped with alkaline or alkaline-earth ions |
| 01/27/2000 | DE19833049A1 Acrylic acid production by gas-phase oxidation of 3C feedstock, involves work-up by condensation and vacuum-crystallization, recycling mother liquor and evaporated liquid to the condensation stage |
| 01/27/2000 | DE19832962A1 Reinigung von Acrylsäure durch Kristallisation mittels Vakuumverdampfung Purification of acrylic acid by crystallization by vacuum evaporation |
| 01/27/2000 | DE19832889A1 Verfahren zur Isolierung und Reinigung von Fettsäuren und Hydroxyfettsäuren aus Insektenwachsen und deren Verwendung A method for isolation and purification of fatty acids and hydroxy fatty acids from insect waxes and their use |
| 01/26/2000 | EP0974639A2 Methods for the isolation and purification of fatty acids and hydroxyfatty acids from insect waxes and uses thereof |
| 01/26/2000 | EP0974574A1 Purification of acrylic acid by crystallisation through vacuum evaporation |
| 01/26/2000 | EP0974395A2 Reactor system |
| 01/26/2000 | EP0973729A1 A process for the preparation of 4-bromomethyl diphenyl compounds |
| 01/26/2000 | EP0973724A1 Novel process for the preparation of (+/-)3- (3,4-dichlorophenyl)-2- dimethylamino-2-methylpropan-1-ol or cericlamine (inn) |
| 01/26/2000 | EP0973718A1 Method for extracting (meth)acrylic acid |
| 01/26/2000 | EP0973717A1 Water separation process |
| 01/26/2000 | EP0973716A1 Improved method for producing crystalline carboxylic acids and apparatus therefor |
| 01/26/2000 | EP0973715A1 Method of recovery of terephthalic acid and ethylene glycol from polyethylene terephthalate wastes |
| 01/26/2000 | EP0973714A2 Production of racemic 2-(6-methoxy-2-naphthyl)propionic acid or precursors thereof |
| 01/26/2000 | EP0973610A1 Process and catalyst for carbonylating olefins |
| 01/26/2000 | EP0759022B1 Method for the preparation of carboxylic acids or corresponding esters in the presence of an iridium-based catalyst and soluble iodides |
| 01/26/2000 | EP0722433B1 Method to produce cyclic esters |
| 01/26/2000 | CN1048652C Multi-metal oxide composition |
| 01/25/2000 | US6018077 Process for producing 2,6-naphthalenedicarboxylic acid |
| 01/25/2000 | US6018057 Such as glutaric anhydride, succinic anhydride, pyromellitic anhydride, cyclohexenedicarboxylic acid anhydride, and phthalic anhydride by contacting the acid precursor and a protonated clay that has not been treated with a metal salt |
| 01/25/2000 | US6018048 Noble metal Raney catalysts and preparation of hydrogenated compounds therewith |
| 01/25/2000 | US6017969 A stable ion-exchange resin against shrinkage, loaded with at least one amphiphilic ion and silver, palladium, and mercury cation; use for purifying alkyl iodide from co-catalysed carbonylation of alcohols |
| 01/25/2000 | CA2040925C Method of purifying polyunsaturated aliphatic compounds |
| 01/20/2000 | WO2000002848A1 Novel salts of n-tert-butylhydroxylamine |
| 01/20/2000 | WO2000002847A2 A process for the preparation of 4-carboxy- 5,8,11- tris(carboxymethyl)- 1-phenyl- 2-oxa- 5,8,11- triazatridecan- 13-oic acid |
| 01/20/2000 | WO2000002841A1 Water-soluble zinc pyruvates or their hydrates, method for the production thereof and their use |
| 01/20/2000 | WO2000002840A1 Preparation of carboxylic compounds and their derivatives |
| 01/20/2000 | DE19832088A1 Hydrogenation of benzene polycarboxylic acids or derivatives to give products useful as plasticizers |
| 01/20/2000 | CA2336527A1 Novel salts of n-tert-butylhydroxylamine |
| 01/20/2000 | CA2336115A1 Preparation of carboxylic compounds and their derivatives |
| 01/19/2000 | EP0972758A2 A process for producing phenolic compounds |
| 01/19/2000 | EP0971940A1 Diphosphines |
| 01/19/2000 | EP0971912A1 Process for treating crude phthalic anhydride |
| 01/19/2000 | EP0971872A1 Process for preparing 2,6-naphthalenedicarboxylic acid |
| 01/19/2000 | EP0971871A1 Composition and method for reducing fouling in process equipment used for manufacturing aromatic materials |
| 01/19/2000 | EP0971870A1 Production of terephthalic acid |
| 01/19/2000 | EP0971869A1 Low water diamine/dicarboxylic acid salt preparation |
| 01/19/2000 | CN1241993A Process for the preparation of an aldehyde |
| 01/19/2000 | CN1048481C Technological process of preparing fatty acid with the side product from sebacid acid |
| 01/19/2000 | CN1048480C Synthetic method of cyclohexanol, cyclohexanone and adipic acid |
| 01/18/2000 | US6015924 Deperoxidizing washing waters by catalytic hydrogenation,oxidizing product with nitric acid |
| 01/18/2000 | US6015923 Reacting alcohol or ester with carbon monoxide in presence of nickel and iodide source in carboxylic acid solvent under specified conditions |
| 01/18/2000 | US6015781 Detergent compositions containing selected mid-chain branched surfactants |
| 01/18/2000 | US6015535 Process for producing purified cesium compound from cesium alum |
| 01/13/2000 | WO2000001657A1 Method for purifying acrylic acid or methacrylic acid by crystallization and distillation |
| 01/13/2000 | WO2000001656A1 Methods of extracting catalyst from a reaction mixture in the oxidation of cyclohexane to adipic acid |
| 01/13/2000 | WO2000001655A1 Methods of separating catalyst in solution from a reaction mixture produced by oxidation of cyclohexane to adipic acid |
| 01/13/2000 | WO2000001654A1 Method of producing an aliphatic diacid and nitrous oxide |
| 01/13/2000 | WO2000001653A1 A process for the isolation of aromatic hydroxycarboxylic acids |
| 01/13/2000 | WO2000001647A2 Production of organic compounds which are low in fluoride |
| 01/13/2000 | DE19830633A1 Verfahren zur Herstellung von Cyclopropylamin Process for the preparation of cyclopropylamine |
| 01/13/2000 | CA2491932A1 Novel antihistaminic piperidine derivatives and intermediates for the preparation thereof |
| 01/13/2000 | CA2491927A1 Novel antihistaminic piperidine derivatives and intermediates for the preparation thereof |
| 01/13/2000 | CA2337792A1 Methods of separating catalyst in solution from a reaction mixture produced by oxidation of cyclohexane to adipic acid |
| 01/13/2000 | CA2336812A1 Production of organic compounds which are low in fluoride |
| 01/13/2000 | CA2336461A1 Method of producing an aliphatic diacid and nitrous oxide |
| 01/13/2000 | CA2336396A1 Methods of extracting catalyst from a reaction mixture in the oxidation of cyclohexane to adipic acid |
| 01/13/2000 | CA2335803A1 A process for the isolation of aromatic hydroxycarboxylic acids |
| 01/12/2000 | EP0970952A1 PROCESSES FOR PREPARING 2-($g(v)-ALKOXYCARBONYLALKANOYL)-4-BUTANOLIDES, $g(v)-HYDROXY-($g(v)-3)-KETO FATTY ESTERS, AND DERIVATIVES THEREOF |
| 01/12/2000 | EP0970943A2 Process for the preparation of the cyclopropylamine |
| 01/12/2000 | EP0970942A1 Process for the simultaneous preparation of acrylonitrile and acrylic acid |
| 01/12/2000 | EP0970941A1 Apparatus and method for recovering sorbic acid |
| 01/12/2000 | EP0970937A1 Polymer gel and process for the activation of active hydrogen compounds |
| 01/12/2000 | EP0970745A1 Catalytic system and method for coupling of aromatic compounds |
| 01/12/2000 | EP0970087A1 A process for the preparation of a metal salt of clavulanic acid |